Alert archive / Ohio / Mesoscale Discussions in 2015

Mesoscale Discussion 1746

August 23, 20156 counties in Michigan; 28 counties in Ohio

The Storm Prediction Center issued this mesoscale discussion at Aug 23, 2015, 6:07 PM EDT for 6 counties in Michigan; 28 counties in Ohio. It was in force for 113 min.

The area

The outline as issued.

The facts

Issued: Aug 23, 2015, 6:07 PM EDT (22:07 UTC)
Expired: Aug 23, 2015, 8:00 PM EDT
In force: 113 min
Issued by: the Storm Prediction Center
Chance of a watch: 5%

All 34 counties

Lenawee County, MI, Macomb County, MI, Monroe County, MI, Oakland County, MI, Saint Clair County, MI, Wayne County, MI, Allen County, OH, Ashland County, OH, Auglaize County, OH, Crawford County, OH, Defiance County, OH, Delaware County, OH, Erie County, OH, Fulton County, OH, Hancock County, OH, Hardin County, OH, Henry County, OH, Huron County, OH, Logan County, OH, Lorain County, OH, Lucas County, OH, Marion County, OH, Mercer County, OH, Morrow County, OH, Ottawa County, OH, Paulding County, OH, Putnam County, OH, Richland County, OH, Sandusky County, OH, Seneca County, OH, Union County, OH, Van Wert County, OH, Wood County, OH, Wyandot County, OH

The radar

The Cleveland radar (KCLE), 136 km from the middle of the area, began a volume at 22:07 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Detroit, MI (KDTX), launched 12:00Z, 10.1 hours before the alert went out and 138 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1302 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 41 m²/s²
0-3 km storm-relative helicity: 53 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 23, 1:12 PM EDT	Mesoscale Discussion	SPC	Arenac, Barry, Bay, Branch, Calhoun, Cass and 29 more	93 min

Nearby

Mesoscale Discussions in Ohio, 2015 Mesoscale Discussions in Michigan, 2015 Every mesoscale discussion in 2015

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.